About Threaded Studs and Rods
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About Nuts, Materials, and Finishes
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Low-Strength Steel Threaded Rods
About half the strength of medium-strength steel threaded rods, use these for light duty hanging, mounting, and fastening.
Zinc-plated steel threaded rods are corrosion resistant in wet environments.
For technical drawings and 3-D models, click on a part number.
| Lg. | Tensile Strength, psi  | Hardness | Pkg. Qty. | Pkg. | |
2-56 | |||||
|---|---|---|---|---|---|
| 1" | 50,000 | Rockwell B61 | 50 | 000000000 | 000000 |
| 1 1/2" | 50,000 | Rockwell B61 | 50 | 000000000 | 00000 |
| 2" | 50,000 | Rockwell B61 | 50 | 000000000 | 00000 |
| 3" | 50,000 | Rockwell B61 | 50 | 000000000 | 00000 |
| 1ft. | 50,000 | Rockwell B61 | 1 | 000000000 | 0000 |
| 2ft. | 50,000 | Rockwell B61 | 1 | 000000000 | 0000 |
| 3ft. | 50,000 | Rockwell B61 | 1 | 000000000 | 00000 |
18-8 Stainless Steel Threaded Rods
18-8 stainless steel threaded rods have good chemical resistance and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| Lg. | Tensile Strength, psi | Hardness | Pkg. Qty. | Pkg. | |
2-56 | |||||
|---|---|---|---|---|---|
| 1/2" | 70,000 | Rockwell B70 | 25 | 000000000 | 000000 |
| 3/4" | 70,000 | Rockwell B70 | 25 | 000000000 | 00000 |
| 1" | 70,000 | Rockwell B70 | 10 | 000000000 | 0000 |
| 1 1/4" | 70,000 | Rockwell B70 | 10 | 000000000 | 0000 |
| 1 1/2" | 70,000 | Rockwell B70 | 10 | 000000000 | 0000 |
| 2" | 70,000 | Rockwell B70 | 10 | 000000000 | 00000 |
| 3" | 70,000 | Rockwell B70 | 10 | 000000000 | 00000 |
| 8" | 70,000 | Rockwell B70 | 5 | 000000000 | 00000 |
| 1ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 0000 |
| 2ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 0000 |
| 3ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 0000 |
| 6ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 00000 |
Super-Corrosion-Resistant 316 Stainless Steel Threaded Rods
More corrosion resistant than 18-8 and 410 stainless steel threaded rods, these 316 stainless steel rods have excellent resistance to chemicals and salt water and may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
| Lg. | Tensile Strength, psi | Hardness | Pkg. Qty. | Pkg. | |
316 Stainless Steel | |||||
|---|---|---|---|---|---|
2-56 | |||||
| 1/2" | 70,000 | Rockwell B70 | 25 | 000000000 | 000000 |
| 3/4" | 70,000 | Rockwell B70 | 25 | 000000000 | 00000 |
| 1" | 70,000 | Rockwell B70 | 10 | 000000000 | 0000 |
| 1 1/2" | 70,000 | Rockwell B70 | 10 | 000000000 | 0000 |
| 2" | 70,000 | Rockwell B70 | 10 | 000000000 | 00000 |
| 8" | 70,000 | Rockwell B70 | 1 | 000000000 | 0000 |
| 1ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 0000 |
| 2ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 0000 |
| 3ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 0000 |
| 6ft. | 70,000 | Rockwell B70 | 1 | 000000000 | 00000 |
Aluminum Threaded Rods
One-third the weight of steel, aluminum threaded rods resist corrosion in wet environments and are nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Brass Threaded Rods
Brass threaded rods are corrosion resistant in wet environments, electrically conductive, and nonmagnetic.
For technical drawings and 3-D models, click on a part number.
Steel Press-Fit Studs
These steel studs are zinc plated to resist corrosion in wet environments. Press them into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.
For technical drawings and 3-D models, click on a part number.
| Lg. | PEM® Part Number | Thread Lg. | Drill Bit Size | For Min. Material Thick. | For Min. Lg. Between Hole Center and Sheet Edge | For Hole Dia. | Hole Size Tolerance | Base Dia. | Tensile Strength | Hardness | Pkg. Qty. | Pkg. | |
Zinc-Plated Steel | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2-56 | |||||||||||||
| 1/4" | FH-256-4 | 11/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.159" | Not Rated | Not Rated | 50 | 000000000 | 000000 |
| 5/16" | FH-256-5 | 15/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.159" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
| 3/8" | FH-256-6 | 19/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.159" | Not Rated | Not Rated | 50 | 000000000 | 0000 |
| 1/2" | FH-256-8 | 31/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.159" | Not Rated | Not Rated | 50 | 000000000 | 0000 |
| 5/8" | FH-256-10 | 35/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.159" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
| 3/4" | FH-256-12 | 43/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.159" | Not Rated | Not Rated | 25 | 000000000 | 00000 |
Stainless Steel Press-Fit Studs
18-8 stainless steel studs have good chemical resistance and may be mildly magnetic. Press them into a drilled or punched hole with an arbor press or similar pressure tool. Also known as self-clinching studs, ribs under the head hold the stud firmly in place. Length listed is overall length.
For technical drawings and 3-D models, click on a part number.
| Lg. | PEM® Part Number | Thread Lg. | Drill Bit Size | For Min. Material Thick. | For Min. Lg. Between Hole Center and Sheet Edge | For Hole Dia. | Hole Size Tolerance | Base Dia. | Tensile Strength | Hardness | Pkg. Qty. | Pkg. | |
18-8 Stainless Steel | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2-56 | |||||||||||||
| 1/4" | FHS-256-4 | 5/32" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.129" | Not Rated | Not Rated | 50 | 000000000 | 000000 |
| 5/16" | FHS-256-5 | 7/32" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.129" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
| 3/8" | FHS-256-6 | 5/16" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.129" | Not Rated | Not Rated | 50 | 000000000 | 00000 |
| 1/2" | FHS-256-8 | 27/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.129" | Not Rated | Not Rated | 25 | 000000000 | 0000 |
| 5/8" | FHS-256-10 | 35/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.129" | Not Rated | Not Rated | 25 | 000000000 | 0000 |
| 3/4" | FHS-256-12 | 43/64" | No. 44 | 0.040" | 3/16" | 0.085" | 0.000" to 0.003" | 0.129" | Not Rated | Not Rated | 10 | 000000000 | 0000 |
18-8 Stainless Steel Coupling Nuts
These coupling nuts have good chemical resistance and may be mildly magnetic. Also known as extension nuts, use them to connect and extend threaded rods.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
18-8 Stainless Steel | |||||
| 2-56 | 5/16" | 3/16" | 000000000 | 00000 | 00000 |
Super-Corrosion-Resistant 316 Stainless Steel Coupling Nuts
These coupling nuts have excellent resistance to chemicals and salt water. Also known as extension nuts, use them to connect and extend threaded rods. They may be mildly magnetic.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
316 Stainless Steel | |||||
| 2-56 | 3/8" | 1/4" | 000000000 | 00000 | 00000 |
Plastic Coupling Nuts
These nylon 6/6 coupling nuts are chemical resistant, nonconductive, and lightweight. Also known as extension nuts, use them to connect and extend threaded rods.
For technical drawings and 3-D models, click on a part number.
Temperature Range, °F | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | Threading | Min. | Max. | Color | 1-9 | 10-Up | |
Nylon 6/6 Plastic | |||||||||
| 2-56 | 15/32" | 3/16" | Fully Threaded | Not Rated | 250° | Off-White | 0000000 | 00000 | 00000 |
Brass Coupling Nuts
These coupling nuts are corrosion resistant in wet environments, electrically conductive, and nonmagnetic. Also known as extension nuts, use them to connect and extend threaded rods.
For technical drawings and 3-D models, click on a part number.
Each | |||||
|---|---|---|---|---|---|
| Thread Size | Lg. | Wd. | 1-9 | 10-Up | |
Brass | |||||
| 2-56 | 5/16" | 3/16" | 000000000 | 00000 | 00000 |
Stainless Steel Extra-Long Coupling Nuts
These coupling nuts have good chemical resistance. Also known as sleeve nuts, they're at least twice the length of standard coupling nuts to provide more room to connect and extend long lengths of threaded rods.
For technical drawings and 3-D models, click on a part number.
Inch-to-Inch Female Hex Thread Adapters
Connect two differently sized male-threaded parts, such as threaded rods, and tighten with a standard wrench. The threads on these adapters have various sizes and spacing, so you can increase or decrease thread size or adapt from coarse to fine threading. You can also use them to change the gender of a connection from male to female. Small adapters can work as threaded standoffs, which position and separate circuit boards and other components in assemblies.
Black-oxide steel adapters have a finish that won’t chip or rub off. They match the aesthetics of many systems and resists rust in indoor and dry environments.
Zinc-plated steel adapters resist corrosion until the plating wears away and are often used in dry environments.
18-8 stainless steel adapters withstand wet environments but will corrode when exposed to salt water and other chloride solutions.
316 stainless steel adapters are ideal in wet environments and will not corrode when exposed to salt water or harsh chemicals.
Aluminum adapters are about one third of the weight of steel adapters and resist corrosion in wet environments.
Adapters that meet ASTM specifications are made from or plated with materials that adhere to standards for chemical and physical properties, such as hardness.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | Each | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | (A) | (B) | (A) | (B) | Size | Lg. | Specifications Met | Hardness | 1-9 | 10-Up | |
Black-Oxide Steel | ||||||||||||
| 2-56 | 4-40 | 3/16" | 1/4" | Class 2B | Class 2B | 3/16" | 1" | ASTM A108 | Rockwell B65 | 000000000 | 000000 | 00000 |
| 2-56 | 6-32 | 3/16" | 3/8" | Class 2B | Class 2B | 3/16" | 1" | ASTM A108 | Rockwell B65 | 000000000 | 00000 | 0000 |
| 2-56 | 8-32 | 3/16" | 7/16" | Class 2B | Class 2B | 1/4" | 1 1/2" | ASTM A108 | Rockwell B65 | 000000000 | 00000 | 0000 |
Zinc-Plated Steel | ||||||||||||
| 2-56 | 4-40 | 3/16" | 1/4" | Class 2B | Class 2B | 3/16" | 1" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 00000 | 0000 |
| 2-56 | 6-32 | 3/16" | 3/8" | Class 2B | Class 2B | 3/16" | 1" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 00000 | 0000 |
| 2-56 | 8-32 | 3/16" | 7/16" | Class 2B | Class 2B | 1/4" | 1 1/2" | ASTM A108, ASTM B633 | Rockwell B65 | 000000000 | 00000 | 0000 |
18-8 Stainless Steel | ||||||||||||
| 2-56 | 4-40 | 1/8" | 1/8" | Class 2B | Class 2B | 5/16" | 7/16" | ASTM A582 | Rockwell B80 | 000000000 | 0000 | 0000 |
| 2-56 | 6-32 | 3/16" | 3/8" | Class 2B | Class 2B | 3/16" | 1" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 0000 |
| 2-56 | 8-32 | 3/16" | 7/16" | Class 2B | Class 2B | 1/4" | 1 1/2" | ASTM A582 | Rockwell B80 | 000000000 | 00000 | 00000 |
316 Stainless Steel | ||||||||||||
| 2-56 | 4-40 | 1/8" | 1/8" | Class 2B | Class 2B | 5/16" | 7/16" | ASTM A276 | Rockwell B83 | 000000000 | 0000 | 0000 |
| 2-56 | 6-32 | 1/8" | 9/64" | Class 2B | Class 2B | 5/16" | 1/2" | ASTM A276 | Rockwell B83 | 000000000 | 0000 | 0000 |
| 2-56 | 8-32 | 1/8" | 9/64" | Class 2B | Class 2B | 5/16" | 5/8" | ASTM A276 | Rockwell B83 | 000000000 | 0000 | 0000 |
Aluminum | ||||||||||||
| 2-56 | 4-40 | 3/16" | 1/4" | Class 2B | Class 2B | 3/16" | 1" | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
| 2-56 | 6-32 | 3/16" | 3/8" | Class 2B | Class 2B | 3/16" | 1" | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
| 2-56 | 8-32 | 3/16" | 7/16" | Class 2B | Class 2B | 1/4" | 1 1/2" | __ | Rockwell B56 | 000000000 | 0000 | 0000 |
Inch-to-Metric Female Hex Thread Adapters
Adapt threaded rods from inch to metric. These adapters connect two male-threaded fasteners, so you can change the gender of a mating part or increase or decrease its thread size. The hex-shaped body fits into the head of a standard wrench. Small adapters can also be used as standoffs, positioning and separating circuit boards and other components in assemblies.
Choose black-oxide steel adapters to match the aesthetics of your system or for their mild corrosion resistance. The finish won't chip or rub off. They resist rust in indoor and dry environments, but avoid using them in corrosive environments.
Zinc-plated steel adapters are a good option in dry environments. The zinc plating prevents the steel from corroding until the plating wears away.
18-8 stainless steel adapters resist corrosion caused by water. They're good for wet and damp environments but will corrode when exposed to salt water and other chloride solutions.
At about a third of the weight of steel adapters, aluminum adapters are the lightest we offer. They resist corrosion in wet environments.
For technical drawings and 3-D models, click on a part number.
Thread Size | Thread Lg. | Thread Fit | Hex | Each | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (A) | (B) | Pitch (B), mm | (A) | (B), mm | (A) | (B) | Size | Lg. | Specifications Met | Tensile Strength, psi | Hardness | 1-9 | 10-Up | |
Black-Oxide Steel | ||||||||||||||
| 2-56 | M2.5 | 0.45 | 0.187" | 4.8 | Class 2B | Class 6H | 3/16" | 1" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 000000 | 00000 |
| 2-56 | M3 | 0.5 | 0.187" | 6.4 | Class 2B | Class 6H | 3/16" | 1" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 2-56 | M4 | 0.7 | 0.187" | 11.1 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
Zinc-Plated Steel | ||||||||||||||
| 2-56 | M2.5 | 0.45 | 0.187" | 4.8 | Class 2B | Class 6H | 3/16" | 1" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 2-56 | M3 | 0.5 | 0.187" | 6.4 | Class 2B | Class 6H | 3/16" | 1" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 2-56 | M3.5 | 0.6 | 0.187" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
| 2-56 | M4 | 0.7 | 0.187" | 11.1 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A108, ASTM B633 | 78,000 | Rockwell B85 | 000000000 | 00000 | 0000 |
18-8 Stainless Steel | ||||||||||||||
| 2-56 | M2.5 | 0.45 | 0.187" | 4.8 | Class 2B | Class 6H | 3/16" | 1" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 0000 |
| 2-56 | M3 | 0.5 | 0.187" | 6.4 | Class 2B | Class 6H | 3/16" | 1" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 0000 |
| 2-56 | M3.5 | 0.6 | 0.187" | 9.5 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 00000 |
| 2-56 | M4 | 0.7 | 0.187" | 11.1 | Class 2B | Class 6H | 1/4" | 1 1/2" | ASTM A582 | 85,000 | Rockwell B80 | 000000000 | 00000 | 00000 |
Aluminum | ||||||||||||||
| 2-56 | M2.5 | 0.45 | 0.187" | 4.8 | Class 2B | Class 6H | 3/16" | 1" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |
| 2-56 | M3 | 0.5 | 0.187" | 6.4 | Class 2B | Class 6H | 3/16" | 1" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |
| 2-56 | M4 | 0.7 | 0.187" | 11.1 | Class 2B | Class 6H | 1/4" | 1 1/2" | __ | 45,000 | Rockwell B56 | 000000000 | 0000 | 0000 |
Male Threaded Heat-Set Inserts for Plastic
With the male threaded end on these inserts, mount components directly to plastic parts. The other end has two bands of diagonal knurls that face opposite directions to resist torque and pulling out. Heat the inserts on a hot plate, then press the knurled end into a straight hole. The heat melts the surrounding plastic, and as it cools it hardens around the knurls.
Compared to 3D printed or other plastic male threads that wear down when used over and over, these inserts are brass, which create a stronger fastening base. Brass is also corrosion resistant, nonmagnetic, and can be used as an electrical contact.
For technical drawings and 3-D models, click on a part number.
| Thread Size | Thread Lg. | Installed Lg. | Drill Bit Size | For Max. Hole Dia. | Each | |
Brass | ||||||
|---|---|---|---|---|---|---|
| 2-56 | 3/8" | 0.157" | 3.2 mm | 0.129" | 000000000 | 00000 |